package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.Setmeal;
import com.itheima.reggie.mapper.CategoryMapper;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishService;
import com.itheima.reggie.service.SetmealService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.websocket.OnOpen;

@Service
public class CategoryServiceImpl extends ServiceImpl<CategoryMapper, Category> implements CategoryService {
    @Autowired
    private DishService dishService;

    @Autowired
    private SetmealService setmealService;

    /**
     * 根据id删除分类，删除前需要进行判断
     */
    @Override
    public  void remove(Long id){
        //查询该分类是否关联菜品，如果已经关联，则抛出一个错误

        //添加查询条件，根据条件进行查询
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(Dish::getCategoryId,id);
        int count = dishService.count(queryWrapper);

        if (count > 0){
            //已经关联菜品，抛出错误
            throw new CustomException("当前分类项关联了菜品，不能删除");
        }

        //查询该分类是否关联套餐，如果已经关联，则抛出一个错误

        //添加查询条件，根据条件进行查询
        LambdaQueryWrapper<Setmeal> queryWrapper1 = new LambdaQueryWrapper<>();
        queryWrapper1.eq(Setmeal::getCategoryId,id);
        int count1 = setmealService.count(queryWrapper1);

        if (count1 > 0){
            //已经关联套餐，抛出错误
            throw new CustomException("当前分类项关联了套餐，不能删除");
        }

        //正常删除菜品
        super.removeById(id);;
    }

}
